[PATCH 72/74] perf tools: Allow passing NULL to intlist__find

[Arnaldo Carvalho de Melo]

From: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>

So that we can work with optional parameters that may not set up an
intlist.

Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Mike Galbraith <efault@xxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-e9tmvgdzehqrza11zs0nbg7g@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/util/intlist.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/intlist.c b/tools/perf/util/intlist.c
index 9d07400..cbf0c32 100644
--- a/tools/perf/util/intlist.c
+++ b/tools/perf/util/intlist.c
@@ -59,9 +59,14 @@ void intlist__remove(struct intlist *ilist, struct int_node *node)
 
 struct int_node *intlist__find(struct intlist *ilist, int i)
 {
-	struct int_node *node = NULL;
-	struct rb_node *rb_node = rblist__find(&ilist->rblist, (void *)((long)i));
+	struct int_node *node;
+	struct rb_node *rb_node;
+
+	if (ilist == NULL)
+		return NULL;
 
+	node = NULL;
+	rb_node = rblist__find(&ilist->rblist, (void *)((long)i));
 	if (rb_node)
 		node = container_of(rb_node, struct int_node, rb_node);
 
-- 
1.8.1.1.361.gec3ae6e

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